Boot appliance



FIG. 1 is a top perspective view of a boot appliance showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a cross-sectional elevational view thereof as taken transversely through the set of studs. 

The ornamental design for a boot appliance, as shown and described. 